drivers: net: ethernet: cpsw: Add device tree support to CPSW

This patch adds device tree support for cpsw driver

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 104 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
new file mode 100644
index 00000000000..acca48c4246
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -0,0 +1,104 @@
+TI SoC Ethernet Switch Controller Device Tree Bindings
+------------------------------------------------------
+
+Required properties:
+- compatible		: Should be "ti,cpsw"
+- reg			: physical base address and size of the cpsw
+			  registers map
+- interrupts		: property with a value describing the interrupt
+			  number
+- interrupt-parent	: The parent interrupt controller
+- cpdma_channels 	: Specifies number of channels in CPDMA
+- host_port_no		: Specifies host port shift
+- cpdma_reg_ofs		: Specifies CPDMA submodule register offset
+- ale_reg_ofs		: Specifies ALE submodule register offset
+- ale_entries		: Specifies No of entries ALE can hold
+- host_port_reg_ofs	: Specifies host port register offset
+- hw_stats_reg_ofs	: Specifies hardware statistics register offset
+- bd_ram_ofs		: Specifies internal desciptor RAM offset
+- bd_ram_size		: Specifies internal descriptor RAM size
+- rx_descs		: Specifies number of Rx descriptors
+- mac_control		: Specifies Default MAC control register content
+			  for the specific platform
+- slaves		: Specifies number for slaves
+- slave_reg_ofs		: Specifies slave register offset
+- sliver_reg_ofs	: Specifies slave sliver register offset
+- phy_id		: Specifies slave phy id
+- mac-address		: Specifies slave MAC address
+
+Optional properties:
+- ti,hwmods		: Must be "cpgmac0"
+- no_bd_ram		: Must be 0 or 1
+
+Note: "ti,hwmods" field is used to fetch the base address and irq
+resources from TI, omap hwmod data base during device registration.
+Future plan is to migrate hwmod data base contents into device tree
+blob so that, all the required data will be used from device tree dts
+file.
+
+Examples:
+
+	mac: ethernet@4A100000 {
+		compatible = "ti,cpsw";
+		reg = <0x4A100000 0x1000>;
+		interrupts = <55 0x4>;
+		interrupt-parent = <&intc>;
+		cpdma_channels = 8;
+		host_port_no = 0;
+		cpdma_reg_ofs = 0x800;
+		ale_reg_ofs = 0xd00;
+		ale_entries = 1024;
+		host_port_reg_ofs = 0x108;
+		hw_stats_reg_ofs = 0x900;
+		bd_ram_ofs = 0x2000;
+		bd_ram_size = 0x2000;
+		no_bd_ram = 0;
+		rx_descs = 64;
+		mac_control = 0x20;
+		slaves = 2;
+		slave@0 {
+			slave_reg_ofs = 0x208;
+			sliver_reg_ofs = 0xd80;
+			phy_id = "davinci_mdio-0:00"
+			mac-address = [00 04 9F 01 1B B8];
+		};
+		slave@1 {
+			slave_reg_ofs = 0x208;
+			sliver_reg_ofs = 0xd80;
+			phy_id = "davinci_mdio-0:01"
+			mac-address = [00 04 9F 01 1B B9];
+		};
+	};
+
+(or)
+
+	mac: ethernet@4A100000 {
+		compatible = "ti,cpsw";
+		ti,hwmods = "cpgmac0";
+		cpdma_channels = 8;
+		host_port_no = 0;
+		cpdma_reg_ofs = 0x800;
+		ale_reg_ofs = 0xd00;
+		ale_entries = 1024;
+		host_port_reg_ofs = 0x108;
+		hw_stats_reg_ofs = 0x900;
+		bd_ram_ofs = 0x2000;
+		bd_ram_size = 0x2000;
+		no_bd_ram = 0;
+		rx_descs = 64;
+		mac_control = 0x20;
+		slaves = 2;
+		slave@0 {
+			slave_reg_ofs = 0x208;
+			sliver_reg_ofs = 0xd80;
+			phy_id = "davinci_mdio-0:00"
+			mac-address = [00 04 9F 01 1B B8];
+		};
+		slave@1 {
+			slave_reg_ofs = 0x208;
+			sliver_reg_ofs = 0xd80;
+			phy_id = "davinci_mdio-0:01"
+			mac-address = [00 04 9F 01 1B B9];
+		};
+
+	};